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Summary: Ctors | Methods | Inherited Methods

# StackTraceElement

`public final class StackTraceElement`
`extends Object` `implements Serializable`

java.lang.Object
↳ | java.lang.StackTraceElement

An element in a stack trace, as returned by `Throwable#getStackTrace()`. Each element represents a single stack frame. All stack frames except for the one at the top of the stack represent a method invocation. The frame at the top of the stack represents the execution point at which the stack trace was generated. Typically, this is the point at which the throwable corresponding to the stack trace was created.

## Summary

### Public constructors
`StackTraceElement(String declaringClass, String methodName, String fileName, int lineNumber)` Creates a stack trace element representing the specified execution point.

### Public methods
`boolean` | `equals(Object obj)` Returns true if the specified object is another `StackTraceElement` instance representing the same execution point as this instance.
`String` | `getClassName()` Returns the fully qualified name of the class containing the execution point represented by this stack trace element.
`String` | `getFileName()` Returns the name of the source file containing the execution point represented by this stack trace element.
`int` | `getLineNumber()` Returns the line number of the source line containing the execution point represented by this stack trace element.
`String` | `getMethodName()` Returns the name of the method containing the execution point represented by this stack trace element.
`int` | `hashCode()` Returns a hash code value for this stack trace element.
`boolean` | `isNativeMethod()` Returns true if the method containing the execution point represented by this stack trace element is a native method.
`String` | `toString()` Returns a string representation of this stack trace element.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Public constructors

### StackTraceElement

    public StackTraceElement (String declaringClass,
                    String methodName,
                    String fileName,
                    int lineNumber)

Creates a stack trace element representing the specified execution point.

Parameters
`declaringClass` | `String`: the fully qualified name of the class containing the execution point represented by the stack trace element
`methodName` | `String`: the name of the method containing the execution point represented by the stack trace element
`fileName` | `String`: the name of the file containing the execution point represented by the stack trace element, or `null` if this information is unavailable
`lineNumber` | `int`: the line number of the source line containing the execution point represented by this stack trace element, or a negative number if this information is unavailable. A value of -2 indicates that the method containing the execution point is a native method

Throws
`NullPointerException` | if `declaringClass` or `methodName` is null

## Public methods

### equals

    public boolean equals (Object obj)

Returns true if the specified object is another `StackTraceElement` instance representing the same execution point as this instance. Two stack trace elements `a` and `b` are equal if and only if:

    equals(a.getFileName(), b.getFileName()) &&
         a.getLineNumber() == b.getLineNumber()) &&
         equals(a.getClassName(), b.getClassName()) &&
         equals(a.getMethodName(), b.getMethodName())

where `equals` has the semantics of `Objects.equals`.

Parameters
`obj` | `Object`: the object to be compared with this stack trace element.

Returns
`boolean` | true if the specified object is another `StackTraceElement` instance representing the same execution point as this instance.

### getClassName

    public String getClassName ()

Returns the fully qualified name of the class containing the execution point represented by this stack trace element.

Returns
`String` | the fully qualified name of the `Class` containing the execution point represented by this stack trace element.

### getFileName

    public String getFileName ()

Returns the name of the source file containing the execution point represented by this stack trace element. Generally, this corresponds to the `SourceFile` attribute of the relevant `class` file (as per The Java Virtual Machine Specification, Section 4.7.7). In some systems, the name may refer to some source code unit other than a file, such as an entry in source repository.

Returns
`String` | the name of the file containing the execution point represented by this stack trace element, or `null` if this information is unavailable.

### getLineNumber

    public int getLineNumber ()

Returns the line number of the source line containing the execution point represented by this stack trace element. Generally, this is derived from the `LineNumberTable` attribute of the relevant `class` file (as per The Java Virtual Machine Specification, Section 4.7.8).

Returns
`int` | the line number of the source line containing the execution point represented by this stack trace element, or a negative number if this information is unavailable.

### getMethodName

    public String getMethodName ()

Returns the name of the method containing the execution point represented by this stack trace element. If the execution point is contained in an instance or class initializer, this method will return the appropriate special method name, `<init>` or `<clinit>`, as per Section 3.9 of The Java Virtual Machine Specification.

Returns
`String` | the name of the method containing the execution point represented by this stack trace element.

### hashCode

    public int hashCode ()

Returns a hash code value for this stack trace element.

Returns
`int` | a hash code value for this object.

### isNativeMethod

    public boolean isNativeMethod ()

Returns true if the method containing the execution point represented by this stack trace element is a native method.

Returns
`boolean` | `true` if the method containing the execution point represented by this stack trace element is a native method.

### toString

    public String toString ()

Returns a string representation of this stack trace element. The format of this string depends on the implementation, but the following examples may be regarded as typical:

- `"MyClass.mash(MyClass.java:9)"` - Here, `"MyClass"` is the fully-qualified name of the class containing the execution point represented by this stack trace element, `"mash"` is the name of the method containing the execution point, `"MyClass.java"` is the source file containing the execution point, and `"9"` is the line number of the source line containing the execution point.
- `"MyClass.mash(MyClass.java)"` - As above, but the line number is unavailable.
- `"MyClass.mash(Unknown Source)"` - As above, but neither the file name nor the line number are available.
- `"MyClass.mash(Native Method)"` - As above, but neither the file name nor the line number are available, and the method containing the execution point is known to be a native method.

Returns
`String` | a string representation of the object.

See also:

- `Throwable.printStackTrace()`

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